Celestial hemisphere:  Northern  ·  Constellation: Lyra (Lyr)  ·  Contains:  IC 1296  ·  M 57  ·  NGC 6720  ·  Ring nebula in Lyra
Messier 57 or M57 or Ring Nebula (NGC 6822) in Barnard's Galaxy, Stephen Harris
Messier 57 or M57 or Ring Nebula (NGC 6822) in Barnard's Galaxy
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Messier 57 or M57 or Ring Nebula (NGC 6822) in Barnard's Galaxy

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Description

The Ring Nebula (also catalogued as Messier 57, M57 or NGC 6720) is a planetary nebula in the northern constellation of Lyra.[5] Such objects are formed when a shell of ionized gas is expelled into the surrounding interstellar medium by a red giant star, which was passing through the last stage in its evolution before becoming a white dwarf.

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Messier 57 or M57 or Ring Nebula (NGC 6822) in Barnard's Galaxy, Stephen Harris